self Maths Puzzle

the cost of a piece of diamond varies as the square of its weight. A diamond of cost 5184 is cut into 3 pieces whose weight are in the ratio of 1:2:3. Find the loss involved in cutting.

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self Other Question

the capacity of two hemispherical vessels are 6.4litres and 21.6 litres. The ratio of their inner radii is A farmer divides his herd of n cows among his four sons, so that th efirst son gets one-half the herd, the second one-fourth son 7 cows. Then the value of n is